/* =============================================================================
   help.css — Kontextové tooltopy a Help centrum
   Spotřebovává tokeny z style.css, žádné vlastní proměnné.
   ============================================================================= */

/* --- Help ikona (? tlačítko vedle labelů) ---------------------------------- */

.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    font-size: 10px;
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1;
    background: var(--surface-container);
    color: var(--on-surface-variant);
    border: 1px solid var(--outline-variant);
    cursor: pointer;
    vertical-align: middle;
    margin-left: 5px;
    flex-shrink: 0;
    transition: background var(--transition), color var(--transition);
    padding: 0;
}

.help-icon:hover,
.help-icon:focus-visible {
    background: var(--primary-container);
    color: var(--on-primary-container);
    border-color: var(--primary);
}

/* Větší ? tlačítko v nav baru */
.help-nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    font-size: 13px;
    font-family: var(--font-display);
    font-weight: 700;
    background: transparent;
    color: var(--on-surface-variant);
    border: 1.5px solid var(--outline-variant);
    cursor: pointer;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    padding: 0;
    margin-right: 4px;
}

.help-nav-btn:hover,
.help-nav-btn:focus-visible {
    background: var(--primary-container);
    color: var(--on-primary-container);
    border-color: var(--primary);
}

/* --- Tooltip singleton ----------------------------------------------------- */

#help-tooltip {
    position: fixed;
    z-index: 850;
    max-width: 260px;
    padding: 8px 12px;
    background: var(--surface-container-highest);
    color: var(--on-surface);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-float);
    font-size: var(--fs-sm);
    font-family: var(--font-body);
    line-height: 1.45;
    pointer-events: none;
    opacity: 0;
    transition: opacity 120ms ease;
}

#help-tooltip.visible {
    opacity: 1;
}

/* Malá šipka — nahoře (tooltip je pod ikonou) */
#help-tooltip::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 12px;
    width: 8px;
    height: 8px;
    background: var(--surface-container-highest);
    border-left: 1px solid var(--outline-variant);
    border-top: 1px solid var(--outline-variant);
    transform: rotate(45deg);
}

/* Flip: tooltip vlevo od ikony — šipka vpravo */
#help-tooltip.flip-left::before {
    left: auto;
    right: 12px;
}

/* Flip: tooltip nad ikonou — šipka dole */
#help-tooltip.flip-above::before {
    top: auto;
    bottom: -5px;
    transform: rotate(225deg);
}

/* --- Help centrum overlay -------------------------------------------------- */

.help-overlay {
    position: fixed;
    inset: 0;
    z-index: 950;
    background: rgba(25, 28, 29, 0.5);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 16px 24px;
    opacity: 0;
    transition: opacity 150ms ease;
    overflow-y: auto;
}

.help-overlay.visible {
    opacity: 1;
}

@media (max-width: 480px) {
    .help-overlay {
        padding: 0;
        align-items: flex-end;
    }
}

/* --- Help modal ------------------------------------------------------------ */

.help-modal {
    background: var(--surface-container-lowest);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 580px;
    max-height: 82vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-float);
    transform: translateY(8px);
    transition: transform 150ms ease;
    overflow: hidden;
}

.help-overlay.visible .help-modal {
    transform: translateY(0);
}

@media (max-width: 480px) {
    .help-modal {
        max-width: 100%;
        max-height: 90vh;
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
    }
}

/* --- Modal header ---------------------------------------------------------- */

.help-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 0;
    flex-shrink: 0;
}

.help-modal-title {
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--on-surface);
    letter-spacing: -0.01em;
}

.help-modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius);
    background: transparent;
    border: none;
    color: var(--on-surface-variant);
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
    transition: background var(--transition);
    padding: 0;
}

.help-modal-close:hover {
    background: var(--surface-container);
}

/* --- Tabs ------------------------------------------------------------------ */

.help-tabs {
    display: flex;
    gap: 2px;
    padding: 12px 20px 0;
    overflow-x: auto;
    scrollbar-width: none;
    flex-shrink: 0;
    border-bottom: 1px solid var(--outline-variant);
}

.help-tabs::-webkit-scrollbar {
    display: none;
}

.help-tab {
    flex-shrink: 0;
    padding: 6px 12px;
    border: none;
    border-radius: var(--radius) var(--radius) 0 0;
    background: transparent;
    color: var(--on-surface-variant);
    font-family: var(--font-display);
    font-size: var(--fs-sm);
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    position: relative;
    transition: color var(--transition), background var(--transition);
    margin-bottom: -1px;
}

.help-tab:hover {
    color: var(--on-surface);
    background: var(--surface-container-low);
}

.help-tab.active {
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
    background: var(--surface-container-lowest);
}

/* --- Modal body (scrollable) ----------------------------------------------- */

.help-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.help-section {
    display: none;
}

.help-section.active {
    display: block;
}

/* --- Obsah help sekcí ------------------------------------------------------ */

.help-block {
    margin-bottom: 20px;
}

.help-block:last-child {
    margin-bottom: 0;
}

.help-block-heading {
    font-family: var(--font-display);
    font-size: var(--fs-base);
    font-weight: 600;
    color: var(--on-surface);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.help-block-body {
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    color: var(--on-surface-variant);
    line-height: 1.55;
}

.help-block-body p + p {
    margin-top: 6px;
}

/* Stavový text (Aktivní · Pozastaveno...) */
.help-states {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
    margin-top: 8px;
}

.help-state-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: var(--fs-xs);
    font-family: var(--font-display);
    color: var(--on-surface-variant);
    font-weight: 500;
}

.help-state-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* Oddělovač sekcí */
.help-divider {
    border: none;
    border-top: 1px solid var(--outline-variant);
    margin: 16px 0;
}

/* --- Tabulka klávesových zkratek ------------------------------------------ */

.help-shortcuts-table {
    width: 100%;
    border-collapse: collapse;
}

.help-shortcuts-table tr {
    border-bottom: 1px solid var(--outline-variant);
}

.help-shortcuts-table tr:last-child {
    border-bottom: none;
}

.help-shortcuts-table td {
    padding: 8px 4px;
    font-size: var(--fs-sm);
    font-family: var(--font-body);
    color: var(--on-surface-variant);
    vertical-align: middle;
}

.help-shortcuts-table td:first-child {
    width: 80px;
}

kbd {
    display: inline-block;
    padding: 2px 6px;
    border-radius: var(--radius);
    background: var(--surface-container-high);
    border: 1px solid var(--outline-variant);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: 600;
    color: var(--on-surface);
    line-height: 1.4;
}

/* --- Snooze seznam --------------------------------------------------------- */

.help-snooze-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 6px;
}

.help-snooze-list li {
    font-size: var(--fs-sm);
    color: var(--on-surface-variant);
    padding-left: 12px;
    position: relative;
    line-height: 1.4;
}

.help-snooze-list li::before {
    content: '·';
    position: absolute;
    left: 0;
    color: var(--outline);
}

.help-snooze-list strong {
    color: var(--on-surface);
    font-weight: 500;
}

/* --- Reduced motion -------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    .help-overlay,
    .help-modal,
    #help-tooltip {
        transition: none;
    }
}